Glaciator's page

I was looking at the Poisoner Archetype and had a question regarding the Master Poisoner ability.

At 3rd level, a poisoner can use

Craft (alchemy) to change the type of a poison. This
requires 1 hour of work with an alchemist’s lab and a
Craft (alchemy) skill check with a DC equal to the poison’s
DC. If successful, the poison’s type changes to contact,
ingested, inhaled, or injury.

I understand the poison changes type, but what about onset times? Say I want to change Drow Poison to ingested. From the table of example poisons in the Core, almost all of the ingested poisons have on onset time of 10 minutes. Does this mean my "changed" Drow Poison will have an onset time of 10 minutes, or is it still instant? And vice verse, if I want to change a Lich Dust from ingested to injury, does the onset time become instant or stay 10 minutes?

If it doesn't change the onset time, then is it worth trying to change the types?

Thanks in advance for any input. :)